情况越来越糟糕，贮备物资也快用完了。Conditions are getting worse and supplies are running out.当时我们呼吸非常急促，很快就要把空气用完了。We were breathing really fast, and using the air up quickly.现在，这架飞机的燃料快用完了。By now the plane was running out of fuel....

“用完了”的英语可以翻译为：un out of，use up...